Analysis on Benefit of Recent Integrated Control Projects for Heihe River Basin in Zhangye City
WANG Qi-chao1, HU Guang-lu2,3, CHEN Hai-niu1
1.Wujiang Water Resource Conservancy Bureau of Ganzhou District, Zhangye 734000, Gansu, China; 2.Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 3.Gansu Provincial Water Conservancy and Hydropower School, Lanzhou 730000, China
Against the deteriorating eco-environment in middle reaches of Heihe River basin, a water allocating project was put into practice since 2000 according to the State Councils instruction. The project planned that the discharged water from the Zhengyixia hydrological station must reach 9.5×108 m3 when the runoff at Yingluoxia station is 15.8×108 m3. The recent integrated control project for Heihe River basin began in 2001. This paper introduced the situation about recent integrated control project (2000—2005) for Heihe River basin in Zhangye city, and analyzed the benefit brought by the project. In the 6 years of redistributing water in the middle reaches of Heihe River, the discharged water to the lower reaches amounted to 53.42×108 m3, the times 23 and the days 396. The Zhangye City had decreased its water use from main stream of Heihe River and agricultural water consumption, but had increased the groundwater exploitation and the industrial and the ecological water use. The eco-environment in lower reaches of Heihe River basin gradually being recovered. In the 5 years since carrying out the integrated control project, the efficiency of water use in industry and agriculture improved obviously, the structure of agricultural cultivation has been optimized and the industrial economy structure tended to be more reasonable, the net income of the farmers had been enhanced by 28%, which proved that the water-saving benefit of the water-saving project was obvious.